The present disclosure provides a method and a device for compositing a plurality of images. The method includes obtaining a first exposure time t required for current photographing. The first exposure time t is divided into N segments where N is M power of 4, and M is a positive integer. A micro-electro-mechanical system (MEMS) controls an image sensor to move clockwise or anticlockwise according to a step length of a preset number of pixels. The image sensor is controlled to expose for a second exposure time t/N after each movement of the image sensor according to the preset number of pixels, to obtain N images. The N images are composited to obtain a composite picture.